Advice for first mining rig

Hello Everybody.

Im from the Netherlands and i try to start a mining rig and later a solar mining rig. The electric cost are 0.21KWh EURO cents.

As an beginner I have a couple questions;

Is the 5700XT a good gpu for a electric efficient rig ?
Or do u got another recommendation for my first rig.

How many years does a gpu last?
Which mining software is good? I know nicehash
How far can I go with kWh in a normal house?
How profitable is mining versus staking

Thanks for helping me.